package com.example.myandroid;

import java.sql.Date;
import java.text.SimpleDateFormat;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {
	private Button myButton; 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		myButton = (Button)findViewById(R.id.button1);
		myButton.setOnClickListener(new OnClickListener(){ 
            
           @Override 
           public void onClick(View v) { 
               // TODO Auto-generated method stub 
               //这里填写单击按钮后要执行的事件
        	   showBtnView();
           } 
            
       });

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
	
	private void showBtnView(){
		SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
		java.util.Date date=new java.util.Date();  
		String strTime=sdf.format(date); 
        TextView tv = new TextView(this);
        tv.setText("Hello, World! time is:" + strTime);
        setContentView(tv);
	}
}
